package com.sky.aspect;

import com.sky.annotation.Autofill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

import static com.sky.constant.AutoFillConstant.*;

/*自定义切面类*/
@Slf4j
@Aspect
@Component
public class AutoFillAspect {
    /*切入点*/
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.Autofill)")
    public void autoFillPointCut(){}

    /*方法实现*/
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行数据填充");

        MethodSignature signature =(MethodSignature) joinPoint.getSignature();
        Autofill autofill = signature.getMethod().getAnnotation(Autofill.class);
        OperationType value = autofill.value();//获取操作类型

        Object[] args = joinPoint.getArgs();//获取方法参数
        if(args == null || args.length == 0){
            return;
        }
        Object entity = args[0];//获取参数对象
        //准备赋值数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        //根据对应的操作类型，为对应的属性赋值
        if(value == OperationType.INSERT){
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(SET_UPDATE_USER, Long.class);

                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);

            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }else if(value == OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(SET_UPDATE_USER, Long.class);

                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }


        }


    }
}
